A form with a treeview which has worked for years under VFP 7 now fails to respond to a doubleclick event. This happened when upgrading from VFP 7 to VFP 9 SP1. The application uses a wrapper (as described by Doug Henning) to call the treeview. It does display on the form and does open nodes, but does not run any of the sync code in the click evemt method or doubleclick event method. Was there some change with between Version 7 and 9 that would explain this?